Gurr André, Pearson Marc David, S Dazert
Departamento de Otorrinolaringologia e Cirurgia de Cabeça e Pescoço - Ruhr-University Bochum, Alemanha.
Braz J Otorhinolaryngol. 2011 Jan-Feb;77(1):51-7. doi: 10.1590/s1808-86942011000100009.
Human temporal bones in teaching ear surgery are rare. The lamb's temporal bone might be a possible alternative. Temporal bones of the lamb were dissected with a typical temporal bone lab drilling program. We included a mastoidectomy, endaural approaches, but also analyzed the outer appearance, the external ear canal and the hypotympanon. Some steps differed from preparation done in humans. The morphometric results were compared to the known anatomy of human in order to verify the lambs' temporal bone for suitability in otosurgic training. The lambs' temporal bone appears smaller than the human one. We found a bullous extended hypotympanon located under the external ear canal. The tympanic membrane is very similar to the human one. The external ear canal is smaller and shorter. The ossicular chain shows analogies to human one. This study shows, that especially the middle ear, the tympanic membrane and the external ear canal are morphologically equal to the structures found in human temporal bones. The lamb seems feasible for teaching the anatomy of the ear. The smaller scales of some structures, especially the outer components of the temporal bone are a disadvantage. The lamb seems to be an alternative in teaching ear surgery.
用于耳外科教学的人类颞骨非常罕见。羊的颞骨可能是一种可行的替代物。按照典型的颞骨实验室钻孔程序对羊的颞骨进行解剖。我们进行了乳突切除术、耳道内入路，还对外表、外耳道和下鼓室进行了分析。有些步骤与人类尸体解剖有所不同。将形态测量结果与已知的人类解剖结构进行比较，以验证羊颞骨在耳外科手术训练中的适用性。羊的颞骨看起来比人类的小。我们发现外耳道下方有一个膨大的下鼓室。鼓膜与人类的非常相似。外耳道更小、更短。听骨链与人类的有相似之处。这项研究表明，尤其是中耳、鼓膜和外耳道在形态上与人类颞骨中的结构相同。羊似乎适合用于耳部解剖教学。一些结构尺寸较小，尤其是颞骨的外部结构，这是一个缺点。羊似乎是耳外科教学的一种替代选择。
